feat: make result for config --services command type safe

src/index.ts

@@ -27,6 +27,10 @@ export type DockerComposeConfigResult = {
   }
 }
 
+export type DockerComposeConfigServicesResult = {
+  services: string[]
+}
+
 export interface IDockerComposeLogOptions extends IDockerComposeOptions {
   follow?: boolean
 }
@@ -316,10 +320,19 @@ export const config = async function (
   }
 }
 
-export const configServices = function (
+export const configServices = async function (
   options?: IDockerComposeOptions
-): Promise<IDockerComposeResult> {
-  return execCompose('config', ['--services'], options)
+): Promise<TypedDockerComposeResult<DockerComposeConfigServicesResult>> {
+  try {
+    const result = await execCompose('config', ['--services'], options)
+    const services = result.out.split('\n')
+    return {
+      ...result,
+      data: { services }
+    }
+  } catch (error) {
+    return Promise.reject(error)
+  }
 }
 
 export const configVolumes = function (

test/index.test.ts

@@ -525,11 +525,12 @@ test('config show data for docker-compose files (services)', async (): Promise<v
   const std = await compose.configServices({
     cwd: path.join(__dirname),
     log: logOutput,
-    config: 'docker-compose-42.yml'
+    config: 'docker-compose-build.yml'
   })
 
+  expect(std.data.services.length).toBe(6)
+  expect(std.data.services[0]).toBe('build_test_1')
   expect(std.err).toBeFalsy()
-  expect(std.out.includes('some-service')).toBeTruthy()
 })
 
 test('config show data for docker-compose files (volumes)', async (): Promise<void> => {